为确定1龄野生曲波皱纹蛤(Periglypta chemnitzii)外部形态性状对其湿质量的影响程度,以海南省三亚市自然海域捕捞的312只1龄野生曲波皱纹蛤为研究对象,对其外部形态性状壳长、壳高、壳宽及湿质量进行测量统计,并进行相关性、多元逐步...为确定1龄野生曲波皱纹蛤(Periglypta chemnitzii)外部形态性状对其湿质量的影响程度,以海南省三亚市自然海域捕捞的312只1龄野生曲波皱纹蛤为研究对象,对其外部形态性状壳长、壳高、壳宽及湿质量进行测量统计,并进行相关性、多元逐步回归和通径分析。结果显示,曲波皱纹蛤的各性状指标的变异系数范围为6.12%~17.01%,并且各性状之间的相关系数均已达到极显著水平(P R2 = 0.619,壳长对湿质量的直接作用最大为0.617,而壳高通过壳长对湿质量的间接作用最大为0.549,其中壳长对湿质量的决定系数为0.381。结果表明,在对曲波皱纹蛤进行亲贝挑选过程中,应当重视对壳长的选择,制定合理的选种方案,进而达到以湿质量为选育标准的目的。 In order to determine the influenceof external morphological traits on wet weight of 1-year-old wild Periglypta chemnitzii, 312 1-year-oldwild P. chemnitzii were collected in the natural sea area of Sanya City,Hainan Province for measuring the shell length, shell height, shell width andwet weight, and the correlation analysis, path analysis and multiple stepwiseregression analysis were conducted. The results showed that the coefficient ofvariation of P. chemnitzii traits ranged from 6.12% to 17.01%, and the correlationcoefficients between each trait reached an extremely significant level (P R2 = 0.619. The maximum direct effect of shelllength on wet weight was 0.617, the maximum indirect effect of shell height onwet weight through shell length was 0.549, and the determination coefficient ofshell length on wet weight was 0.381. The results suggest that in the processof parent-shell selection of P. chemnitzii, attention should be paid tothe selection of shell length, andreasonable selection scheme should be formulated, so as to achieve the purposeof taking wet weight as the breeding standard.展开更多
lnterspecific hybridization can generate heterosis, which is proven to be a useful tool in selective breeding programs for oyster culture. Crassostrea angulata and C. ariakensis are two important economic shellfish sp...lnterspecific hybridization can generate heterosis, which is proven to be a useful tool in selective breeding programs for oyster culture. Crassostrea angulata and C. ariakensis are two important economic shellfish species in China. We conducted 2 × 2 reciprocal crosses to determine whether these two species can cross-fertilize and their hybrids can hatch, survive and perform hetero- sis. Fertilization was found symmetrical without delay. The rate of fertilization success of C. angulata ♀× C. ariakensis ♂ was lower than that of C. ariakensis ♀ x C. angulata ♂, and the success rate of both hybridizations was lower than that of two intraspecific crosses each. During the planktonic period, survival rate of the progeny was lower in the hybrid crosses than in the intraspecific crosses. On day 360, mean shell height of the progeny of C. angulata ♀ x C. angulata ♂ was highest, which was followed by that of C. angulata ♀ × C. ariakensis ♂, C. ariakensis ♀x C. ariakensis ♂ and C. ariakensis ♀× C. angulata ♂ in a descending order. Mor- phology of adults produced by the hybrid crosses was similar to that of C. angulata. Both hybrids underwent normal gonad devel- opment and produced mature gametes in the mating season. This study provided new insights into the quantitative traits in interspeci- fic crosses of Crassostrea species, thus being of guidance value for selective breeding of oyster.展开更多
文摘为确定1龄野生曲波皱纹蛤(Periglypta chemnitzii)外部形态性状对其湿质量的影响程度,以海南省三亚市自然海域捕捞的312只1龄野生曲波皱纹蛤为研究对象,对其外部形态性状壳长、壳高、壳宽及湿质量进行测量统计,并进行相关性、多元逐步回归和通径分析。结果显示,曲波皱纹蛤的各性状指标的变异系数范围为6.12%~17.01%,并且各性状之间的相关系数均已达到极显著水平(P R2 = 0.619,壳长对湿质量的直接作用最大为0.617,而壳高通过壳长对湿质量的间接作用最大为0.549,其中壳长对湿质量的决定系数为0.381。结果表明,在对曲波皱纹蛤进行亲贝挑选过程中,应当重视对壳长的选择,制定合理的选种方案,进而达到以湿质量为选育标准的目的。 In order to determine the influenceof external morphological traits on wet weight of 1-year-old wild Periglypta chemnitzii, 312 1-year-oldwild P. chemnitzii were collected in the natural sea area of Sanya City,Hainan Province for measuring the shell length, shell height, shell width andwet weight, and the correlation analysis, path analysis and multiple stepwiseregression analysis were conducted. The results showed that the coefficient ofvariation of P. chemnitzii traits ranged from 6.12% to 17.01%, and the correlationcoefficients between each trait reached an extremely significant level (P R2 = 0.619. The maximum direct effect of shelllength on wet weight was 0.617, the maximum indirect effect of shell height onwet weight through shell length was 0.549, and the determination coefficient ofshell length on wet weight was 0.381. The results suggest that in the processof parent-shell selection of P. chemnitzii, attention should be paid tothe selection of shell length, andreasonable selection scheme should be formulated, so as to achieve the purposeof taking wet weight as the breeding standard.
基金supported by the National Natural Science Foundation of China(Grant No.31172403)the National Key Basic Research Development Planning Project(Grant No.2010CB126406)
文摘lnterspecific hybridization can generate heterosis, which is proven to be a useful tool in selective breeding programs for oyster culture. Crassostrea angulata and C. ariakensis are two important economic shellfish species in China. We conducted 2 × 2 reciprocal crosses to determine whether these two species can cross-fertilize and their hybrids can hatch, survive and perform hetero- sis. Fertilization was found symmetrical without delay. The rate of fertilization success of C. angulata ♀× C. ariakensis ♂ was lower than that of C. ariakensis ♀ x C. angulata ♂, and the success rate of both hybridizations was lower than that of two intraspecific crosses each. During the planktonic period, survival rate of the progeny was lower in the hybrid crosses than in the intraspecific crosses. On day 360, mean shell height of the progeny of C. angulata ♀ x C. angulata ♂ was highest, which was followed by that of C. angulata ♀ × C. ariakensis ♂, C. ariakensis ♀x C. ariakensis ♂ and C. ariakensis ♀× C. angulata ♂ in a descending order. Mor- phology of adults produced by the hybrid crosses was similar to that of C. angulata. Both hybrids underwent normal gonad devel- opment and produced mature gametes in the mating season. This study provided new insights into the quantitative traits in interspeci- fic crosses of Crassostrea species, thus being of guidance value for selective breeding of oyster.
